BQ27441EVM-G1A: BQ27441EVM-G1A

Hello,

Was there any ESD damage done to the gauge? Was the VDD used for powering anything else? What functionality were you using for GPOUT?

Sincerely,

Wyatt Keller

Hi,

No ESD damage done.

Left floating both pins

Thanks and regards

P.Akhil.

Hello,

Was this test with the EVM? The VDD pin should have a capacitor to VSS to stabilize the 1.8V supply.

Sincerely,

Wyatt Keller

Hi,

No I desiged my own board and yes capacitor is present

Thanks and regards

P.Akhil

Hello,

Can you share the schematic of your layout and your .gg file?

Sincerely,

Wyatt Keller

Hello,

What is a GG gile

Thanks & regards

P.Akhi.6327.TI.pdf

Hi,

No facing only In one board. Not the same issue.

I am looking for any example program to use.

Where can i find the example program to use with my ESP32 controller

Thanks and regards,

P.Akhil.

Hello,

I got some example code with Arduino, I am using it and i think the programs is not giving correct data. for example the sample of output looks like this :

Time stamp > state-of-charge (%), battery voltage (mV), average current draw from the battery (mA), remaining and full capacities (mAh), average power draw on the battery (mW), and the battery's state-of-health (%).

"11:38:42.653 -> 0% | 3107 mV | -857 mA | 0 / 2231 mAh | -2663 mW | 96%". Actual voltage across battery is 3.6V,In serial monitor it is showing 3107mV | I have connected ammeter across battery and it is showing 0.60A,in serial monitor it is showing 857mA,

Is there anything wrong with my program.

I want exact SOC, Remaining voltage and current drawn form battery.

Program : 

#include <SparkFunBQ27441.h>

// Set BATTERY_CAPACITY to the design capacity of your battery.
const unsigned int BATTERY_CAPACITY = 2500; // e.g. 850mAh battery

void setupBQ27441(void)
{
  // Use lipo.begin() to initialize the BQ27441-G1A and confirm that it's
  // connected and communicating.
  if (!lipo.begin()) // begin() will return true if communication is successful
  {
	// If communication fails, print an error message and loop forever.
    Serial.println("Error: Unable to communicate with BQ27441.");
    Serial.println("  Check wiring and try again.");
    Serial.println("  (Battery must be plugged into Battery Babysitter!)");
    while (1) ;
  }
  Serial.println("Connected to BQ27441!");
  
  // Uset lipo.setCapacity(BATTERY_CAPACITY) to set the design capacity
  // of your battery.
  lipo.setCapacity(BATTERY_CAPACITY);
}

void printBatteryStats()
{
  // Read battery stats from the BQ27441-G1A
  unsigned int soc = lipo.soc();  // Read state-of-charge (%)
  unsigned int volts = lipo.voltage(); // Read battery voltage (mV)
  int current = lipo.current(AVG); // Read average current (mA)
  unsigned int fullCapacity = lipo.capacity(FULL); // Read full capacity (mAh)
  unsigned int capacity = lipo.capacity(REMAIN); // Read remaining capacity (mAh)
  int power = lipo.power(); // Read average power draw (mW)
  int health = lipo.soh(); // Read state-of-health (%)

  // Now print out those values:
  String toPrint = String(soc) + "% | ";
  toPrint += String(volts) + " mV | ";
  toPrint += String(current) + " mA | ";
  toPrint += String(capacity) + " / ";
  toPrint += String(fullCapacity) + " mAh | ";
  toPrint += String(power) + " mW | ";
  toPrint += String(health) + "%";
  
  Serial.println(toPrint);
}

void setup()
{
  Serial.begin(115200);
  setupBQ27441();
}

void loop() 
{
  printBatteryStats();
  delay(1000);
}

Please help.

Thanks and regards,

P.Akhil.

Hello,

Yes with reduced capacitance.

This is done on another board and VDD is not oscillating.

I will check the example code and revert back.

Thanks and Regards,

P.Akhil.